package cn.tedu.submarine;
public class Test {
    public static void main(String[] args) {
        Aoo o1 = new Aoo();
        Object o2 = new Aoo();

        Boo o3 = new Boo();
        Object o4 = new Boo();

        ObserveSubmarine o5 = new ObserveSubmarine();
        SeaObject o6 = new ObserveSubmarine();
        EnemyScore o7 = new ObserveSubmarine();
        Object o8 = new ObserveSubmarine();
    }
}

class Aoo{
}
class Boo{
}




















